Grey Rutile TiO<sub>2</sub> with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination
Colored titanium oxides are usually unstable in the atmosphere. Herein, a gray rutile titanium dioxide is synthesized by two-step calcination successively in a high-temperature reduction atmosphere and in a lower-temperature air atmosphere. The as-synthesized gray rutile TiO<sub>2</sub>...
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MDPI AG
2020-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/5/920 |
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| author | Yan Liu Ping Chen Yaqi Fan Yanfei Fan Xifeng Shi Guanwei Cui Bo Tang |
| author_facet | Yan Liu Ping Chen Yaqi Fan Yanfei Fan Xifeng Shi Guanwei Cui Bo Tang |
| author_sort | Yan Liu |
| collection | DOAJ |
| description | Colored titanium oxides are usually unstable in the atmosphere. Herein, a gray rutile titanium dioxide is synthesized by two-step calcination successively in a high-temperature reduction atmosphere and in a lower-temperature air atmosphere. The as-synthesized gray rutile TiO<sub>2</sub> exhibits higher photocatalytic activity than that of white rutile TiO<sub>2</sub> and shows high chemical stability. This is attributed to interior oxygen vacancies, which can improve the separation and transmission efficiency of the photogenerated carriers. Most notably, a formed surface passivation layer will protect the interior oxygen vacancies and provide long-term photocatalytic activity. |
| first_indexed | 2024-03-10T19:56:06Z |
| format | Article |
| id | doaj.art-0b799936a788401ab18a3760f3e60d2e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T19:56:06Z |
| publishDate | 2020-05-01 |
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| series | Nanomaterials |
| spelling | doaj.art-0b799936a788401ab18a3760f3e60d2e2023-11-19T23:55:25ZengMDPI AGNanomaterials2079-49912020-05-0110592010.3390/nano10050920Grey Rutile TiO<sub>2</sub> with Long-Term Photocatalytic Activity Synthesized Via Two-Step CalcinationYan Liu0Ping Chen1Yaqi Fan2Yanfei Fan3Xifeng Shi4Guanwei Cui5Bo Tang6College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, ChinaCollege of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, ChinaCollege of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, ChinaCollege of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, ChinaCollege of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, ChinaCollege of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, ChinaCollege of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, ChinaColored titanium oxides are usually unstable in the atmosphere. Herein, a gray rutile titanium dioxide is synthesized by two-step calcination successively in a high-temperature reduction atmosphere and in a lower-temperature air atmosphere. The as-synthesized gray rutile TiO<sub>2</sub> exhibits higher photocatalytic activity than that of white rutile TiO<sub>2</sub> and shows high chemical stability. This is attributed to interior oxygen vacancies, which can improve the separation and transmission efficiency of the photogenerated carriers. Most notably, a formed surface passivation layer will protect the interior oxygen vacancies and provide long-term photocatalytic activity.https://www.mdpi.com/2079-4991/10/5/920gray colorrutile titanium dioxideoxygen vacancyphotodecompositionsurface passivation |
| spellingShingle | Yan Liu Ping Chen Yaqi Fan Yanfei Fan Xifeng Shi Guanwei Cui Bo Tang Grey Rutile TiO<sub>2</sub> with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination Nanomaterials gray color rutile titanium dioxide oxygen vacancy photodecomposition surface passivation |
| title | Grey Rutile TiO<sub>2</sub> with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination |
| title_full | Grey Rutile TiO<sub>2</sub> with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination |
| title_fullStr | Grey Rutile TiO<sub>2</sub> with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination |
| title_full_unstemmed | Grey Rutile TiO<sub>2</sub> with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination |
| title_short | Grey Rutile TiO<sub>2</sub> with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination |
| title_sort | grey rutile tio sub 2 sub with long term photocatalytic activity synthesized via two step calcination |
| topic | gray color rutile titanium dioxide oxygen vacancy photodecomposition surface passivation |
| url | https://www.mdpi.com/2079-4991/10/5/920 |
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